Showerhead with arm



FIG. 1 is a perspective view of the new design for a showerhead with arm;

FIG. 2 is a left elevational view of the new design for a showerhead with arm, the right elevational view being a mirror image;

FIG. 3 is a top plan view of the new design for a showerhead with arm;

FIG. 4 is a bottom plan view of the new design for a showerhead with arm;

FIG. 5 is a front elevational view of the new design for a showerhead with arm; and,

FIG. 6 is a rear elevational view of the new design for a showerhead with arm.

The broken lines in the Figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a showerhead with arm, as shown and described. 